Wrench.



HENRY LOUIS BECK, OF PIEDMONT, WEST VIRGINIA.

I WRENCH.

Specification of Letters Patent.

Patented Aug. 18, 1908.

Application filed January 16, 1908. Serial No. 411,102.

To all whom it may concern:

Be it known that I, HENRY LOUIS BECK, a citizen of the United States ofAmerica, residing at Piedmont, in the county of Mineral and State ofWest Virginia, have invented certain new and useful Improvements inWrenches, of which the following is a specification, reference beinghad. therein to the accompanying drawing.

This invention relates to wrenches, of that type commonly styled quickacting monkey wrenches.

The primary object of my invention is, to provide a simple andinexpensive wrench wherein positive and reliable means are employed forquickly adjusting the movable jaw thereof.

A further object of my invention is to provide a strong and durablewrench that can be quickly adjusted to grip an object, and then minutelyadjusted to obtain a better purchase upon the same.

With the above and other objects in view which will more readily appearas the invention is better understood, the same consists in the novelconstruction, combination and arrangement of parts to be hereinafterdescribed and then specifically pointed out in the appended claims.

In the drawings: Figure 1 is an elevation of a wrench constructed inaccordance with my invention, Fig. 2 is a similar View of a portion ofthe wrench, illustrating the movable jaw thereof in section, Fig. 3 is ahorizontal sectional view of a wrench taken on the line III-III of Fig.2, and Fig, 4 is an elevation of a portion of a wrench illustrating aslight modification.

In the accompanying drawings, 1 designates a shank having a fixed jaw 2and a detachable handle 3. The shank 1 has its front ed e toothed as at4.

I lidably mounted upon the shank 1 is a movable jaw, said jaw comprisinga channel shaped body 5 adapted to embrace the shank 1, a gripping aw 6having a recess 7 formed therein and a strap 8 adapted to embrace theshank 1. Pivotally mounted by a pin 9 within the recess 7 of the jaw 6is a rod 10, and revolubly mounted upon said rod is a worm nut 11adapted to engage the teeth 4 of the shank 1. The nut 11 is revolublymounted between two collars 12 fixed upon the rod 10 by screws or pins13. The strap 8 is cut away as at 14, and secured in the cut awayportions of said strap by screws 15 or similar fastening means areresilient arms 16, these arms embracing the lower end of the rod 10 andholding the nut 11 carried by said rod in engagement with the toothedshank. The lower end of the rod 10 is provided with a detachable collaror cap 17 but this may be dispensed with.

By referring to Fig. 2 of the drawings, it will be observed that the nut11 can be swung out of engagement with the shank 1, and the movable jawquickly adjusted to engage an object. The nut 11 can then be swung toengage the shank 1 and rotate it to minutely adjust the movable jaw.

In Fig. 1 of the drawings, I have illustrated a slight modification ofmy invention, wherein the rod 10 is threaded as at 18 for a nut 19. Thisnut is adapted to engage in equally spaced recesses 20 provided thereforin the shank 1.

In the preferred form, the nut 11 is rotated and moves with relation tothe shank 1, but in the modification, the nut 19 is rotated, and remainsstationary with relation to the shank 1, while the movable aw isadjusted through the medium of the threaded rod 10 and the nut 19. Thethreaded rod 10 is of a sufficient length to permit of a fineradjustment being obtained than could be otherwise obtained by therecesses 20.

It is apparent from the novel construction of my wrench that I havedevised an improvement that can be manufactured at a comparatively smallexpense, and when ordi narily used will be free from injury.

My invention is susceptible to such changes as are permissible by theappended claims.

Having now described my invention what I claim as new, is

A wrench comprising the combination with a toothed shank, a fixed jawand a handle carried by the shank, of a movable element slidably mountedupon said shank and comprising a channel-shaped body portion and agripping jaw having a lower face formed with a recess extending at rightangles with respect to the shank and terminating at a point re movedfrom the shank and gradually increasing in'height inwardly, said elementfurther embodying a shouldered strap at its lower end embracing saidshank, a rod having an enlarged apertured upper end pivotally connectedin the recess at the inner end thereof, the enlarged end of the rodbeing rounded and. adapted to correspond in contour to the inner wall ofsaid recess, said. rod of less length than said element and carrying apair of fixed collars, one of said collars arranged in close proximityto the enlarged end of the rod, a worm nut revolubly mounted upon saidrod between the collars of greater diameter than the collars and adaptedto engage said toothed shank, the other of said collars arranged inclose proximity to said strap, resilient arms carried by and projectingfrom each side of the strap, said arms converging towards each other andembracing the lower end of the rod whereby the rod is maintained inparallelism with respect to the shank and the worm nut maintained inengagement with the teeth of the shank, and said rod projecting belowsaid 15 strap and provided with a handle.

In testimony whereof I alTiX my signature in the presence of twowitnesses.

' HENRY LOUIS BECK. Witnesses:

GEO. C. BECK, JAs. T. l/VOODWARD.

